What is UCS value of soil?
What is UCS value of soil?
Unconfined compressive strength (UCS) increased along the curing time, reaching a maximum value of 5.68 MPa after 90 days. Based on the UCS, the optimum refractory GGBS ratios oscillate between 30:70 and 50:50. The UCS values after soaking samples reduced the unsoaked results between 68.70% to 94.41%.
Can you run an unconfined compression test on sand?
The unconfined compression test is inappropriate for dry sands or crumbly clays because the materials would fall apart without some land of lateral confinement. To perform an unconfined compression test, the sample is extruded from the sampling tube.
What is UCS in soil mechanics?
4.2 The Unified Soil Classification System The Unified Soil Classification System (USCS) originally developed by Casagrande (1948). According to this system, the symbols of the various soils are as: Gravel (G), Sand (S), Silt or Silty (M), Clay or Clayey (C), Organic (O), Peat (Pt), Well graded (W), Poorly graded (P).
How do you do the UCS test?
- Take two frictionless bearing plates of 75 mm diameter.
- Place the specimen on the base plate of the load frame (sandwiched between the end plates).
- Place a hardened steel ball on the bearing plate.
- Adjust the center line of the specimen such that the proving ring and the steel ball are in the same line.
Is code for UCS test of soil?
IS 2720 ( Part 10 ) : 1991
IS 2720 ( Part 10 ) : 1991 – Determination of Unconfined Compressive Strength. In this IS code detailed procedure of the calculations along with the apparatus used for performing laboratory unconfined compression test on clayey soil, undisturbed, remoulded or compacted, using controlled rate of strain is given.
What is unconfined soil?
The unconfined compression test is the most popular method of soil shear testing because it is one of the fastest and least expensive methods of measuring shear strength. It is used primarily for saturated, cohesive soils recovered from thin-walled sampling tubes.
Why is unconfined compressive strength of soil important?
Why is unconfined compressive strength (UCS) test important? The Unconfined Compression Test is an important laboratory test. It is used to determine the unconfined and undrained compressive strength of a cohesive soil in an inexpensive manner.
Can every type of soil be tested in unconfined compressive strength Why or why not?
The test is not applicable to cohesionless or coarse-grained soils. The unconfined compression test is strain-controlled, and when the soil sample is loaded rapidly, the pore pressures (water within the soil) undergo changes that do not have enough time to dissipate.
What is U line soil?
A U-Line is also defined as the upper limit of the correlation between plasticity index and liquid limit of the soil. If the test results of soils fall above the U-line then results are considered faulty and experiment should be repeated.
Is code for GSA of soil?
Wet sieve analysis is also needed if the soil particles are coated by clay/silt. Weighing Balance–sensitive to 0.1% of the weight of sample….GRAIN SIZE ANALYSIS OF SOIL BY DRY SIEVING METHOD, lS: 2720 (Part-4): 1985.
|IS Sieve Designation||450 mm Dia. Sieves (in kg)||300 mm Dia. Sieves (in kg)|
|80 mm||15 kg||6 kg|